/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package Controller;

import Model.CustomerManager;
import Model.Product;
import Model.ProductManager;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author 013v
 */
public class CustomerAddtoCart extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            Product newProd = new Product();
            newProd.setProductID(Integer.parseInt(request.getParameter("rd")));
            newProd.setProductQuantity(new CustomerManager().getStock(request.getParameter("rd")));

            if (request.getSession().getAttribute("username") == null) {
                response.sendRedirect("login.jsp");
            } else if (request.getSession(true).getAttribute("checkflag").equals(0)) {
                if (newProd.getProductQuantity() > 0) {
                    Object cartObject = request.getSession().getAttribute("cartArray");
                    String[][] userCart = (String[][]) cartObject;
                    int index = userCart[0].length;

                    boolean InCart = false;
                    String item = request.getParameter("rd");
                    for (int j = 0; j < index; j++) {
                        if (userCart[0][j] != null) {
                            if (userCart[0][j].equals(item)) {
                                InCart = true;
                            }
                        }
                    }
                    if (InCart == false) {
                        int i = 0;
                        boolean containsValue = true;
                        while (i < index || containsValue == true) { //get index with null values
                            if (i == 10) { //avoid array out of bounds
                                containsValue = false;
                            } else if (userCart[0][i] == null) {
                                index = i;
                                containsValue = false;
                            } else {
                                i++;
                            }
                        }

                        if (i < 10) {
                            userCart[0][index] = request.getParameter("rd");
                            userCart[1][index] = "1";
                            int tempvalue = (Integer.parseInt(new ProductManager().getProdPrice(userCart[0][index])) * Integer.parseInt(userCart[1][index]));
                            userCart[2][index] = Integer.toString(tempvalue);

                            int numCart = new CustomerManager().getNumInCart(userCart);
                            request.getSession().setAttribute("numCart", numCart);
                            response.sendRedirect("viewCart.jsp");

                        } else {
                            response.sendRedirect("viewCart.jsp?mess=exnum"); //exceeds maximum items in cart
                        }

                    } else {
                        response.sendRedirect("viewCart.jsp?mess=incart"); //item already in cart
                    }
                } else {
                    response.sendRedirect("viewCart.jsp?mess=outstock"); //out of stock
                }
            }else{
                response.sendRedirect("checkOut.jsp?mess=carterr"); //cart cannot be edited
            }
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
